Note: US Coast Guard - "Uniforms of officers and men are
similar to those of U.S. Navy, but commissioned officers
wear a gold shield on the sleeve instead of a star. ......
Men of the Coast Guard wear a shield on the sleeve" .(Jane's
Fighting Ships)

Following The Naval Reserve Act of 1916,
which did not mention gender, a number of women begin to enlist from
mid-March 1917 and by the end of April 1917, nearly 600 Yeomen (Female)
were on duty. This number grew to over 11,000 in December 1918. Yeomen
(F), or "Yeomanettes" as they were often referred to, mainly served in
secretarial and clerical positions, though some were "translators,
draftsmen, fingerprint experts, ship camouflage designers and recruiting
agents. Five went to France with Naval hospital units and a modest
number of others were stationed in Puerto Rico, Guam, Hawaii and the
Panama Canal Zone. However, the great majority were assigned duties at
Naval installations in the Continental United States, frequently near
their homes, processing the great volume of paperwork generated by the
war effort." By July 1919, numbers were down to under 4,000, when they
were all released. Some Yeomen (F) continued until the end of their
four-year enlistments on inactive reserve status. Thereafter, apart from
Navy Nurses, women did not appear in the uniformed Navy until 1942.
(Source: US Naval Historical Center)

Sources:

Rank and Insignia tables were based on the
excellent Naval-Reference.Net site,
which sadly, no longer seems to be available online.

Rank Illustrations - "Uniforms & Insignia of the Navies of
World War II" compiled by US Naval Intelligence during the
war (only insignia that did not change between the two wars
have been used)

Photographs - all courtesy US Naval
Historical Center (individual named contributors in brackets)